Genetic inheritance of resistance to root knot nematode (Meloidogyne incognita) in eggplant F₂ generation (Solanum melongena)

Mohd Nazarudin, A., . and Noraziyah, A. A. S., . and Nur Adliza, B., . and Farah Huda, S. S., . (2024) Genetic inheritance of resistance to root knot nematode (Meloidogyne incognita) in eggplant F₂ generation (Solanum melongena). Journal of Tropical Agriculture and Food Science (Malaysia), 52 (1). pp. 61-68. ISSN 1394-9829

Eggplant (Solanum melongena L.) is one of the most widely consumed vegetables in Malaysia. However, root knot nematode (RKN) scientifically known as Meloidogyne incognita causes severe eggplant yield loss as high as 37%. The information on genetic diversity and its resistance to RKN is essential for eggplant improvement in Malaysia. This study investigated the inheritance of RKN resistance caused by M. incognita in eggplant progeny. Susceptible eggplant varieties (MTe-02) were crossed with two resistant accessions (DINO 03-0200 and DINO 03-0056) against RKN to produce the seed parent, including the F1 and F2 generations. After 60 days of M. incognita inoculation, the numbers of root knots and egg masses per plant root system were counted using a dissecting microscope. A chi-square (χ2) test of the frequency distribution based on the root knot index (RKI) of the F2 progenies of the two crosses (susceptible × resistant) revealed a 1:3 (susceptible: resistant) ratio. These results confirmed that the resistance gene against M. incognita can be inherited from the resistant parent, which can be used to develop a new eggplant hybrid resistance to M. incognita infection. This model system could also be utilised as a basis to develop new resistance varieties against RKN for other crops.

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Abstract

Eggplant (Solanum melongena L.) is one of the most widely consumed vegetables in Malaysia. However, root knot nematode (RKN) scientifically known as Meloidogyne incognita causes severe eggplant yield loss as high as 37%. The information on genetic diversity and its resistance to RKN is essential for eggplant improvement in Malaysia. This study investigated the inheritance of RKN resistance caused by M. incognita in eggplant progeny. Susceptible eggplant varieties (MTe-02) were crossed with two resistant accessions (DINO 03-0200 and DINO 03-0056) against RKN to produce the seed parent, including the F1 and F2 generations. After 60 days of M. incognita inoculation, the numbers of root knots and egg masses per plant root system were counted using a dissecting microscope. A chi-square (χ2) test of the frequency distribution based on the root knot index (RKI) of the F2 progenies of the two crosses (susceptible × resistant) revealed a 1:3 (susceptible: resistant) ratio. These results confirmed that the resistance gene against M. incognita can be inherited from the resistant parent, which can be used to develop a new eggplant hybrid resistance to M. incognita infection. This model system could also be utilised as a basis to develop new resistance varieties against RKN for other crops.

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Item Type:	Article
AGROVOC Term:	Solanum melongena
AGROVOC Term:	Meloidogyne incognita
AGROVOC Term:	disease resistance
AGROVOC Term:	breeding methods
AGROVOC Term:	genetic inheritance
AGROVOC Term:	statistical methods
AGROVOC Term:	hybrids
Geographical Term:	Malaysia
Uncontrolled Keywords:	root knot nematode
Depositing User:	Ms. Azariah Hashim
Date Deposited:	21 Nov 2025 01:32
Last Modified:	21 Nov 2025 01:32
URI:	http://webagris.upm.edu.my/id/eprint/2686

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